原名「台灣學術線上」
包含TAO期刊庫 + TAO書籍庫 + 論文 + 史料文獻
首頁 | 關於TAO | 瀏覽 | 進階查詢 | 參考工具 | 會員服務 | 已購專書 | RSS服務 | 電子報 | FAQ  
查詢範圍:
   
查詢模式:
熱門查詢詞:
dvd資優生OTAthe man wh
   
   
   
     
   
 
項次 書目
1
題名:Best Current Pattern in Electric Current Computed Tomography     (26點)
電流式電腦斷層攝影系統之最佳電流圖型
著者:Kuo-Sheng Cheng(鄭國順) ;J. S. Tzeng(曾繼紹) ;C. W. Mao(毛齊武)
出版地區:台灣
出版城市:台南市
學科:醫學綜合
關鍵字:電流式電腦斷層攝影 ; 電阻係數 ; 分辨度 ; Electric Current Computed Tomography ; Resistivity ; Distinguishability
刊名:Journal of The Biomedical Engineering Society Of The R.O.C.
卷期:10卷1期(1990.6)
頁碼:1-13
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

本論文提出適應式方法藉由實驗獲得最佳電流,並以實驗數據加以證明;其中最佳電流係以分辨率?測量標準。對於?同心環之非均質與均質情形,經由理論分析可以得到最佳電流圖型?空間正弦函數與餘弦函數所組成的圖型。在本研究中,非均質之實驗狀況包括同心環與偏心環兩類,係使用直徑?10.5mm,22.5mm,35.0mm和41.5mm的銅管所模擬而成。對於同心環情形,從實驗結果顯示,電流圖型可以快速逐次趨近其最佳電流,亦即空間餘弦函數。對於偏心環情形,雖然最佳電流不是餘弦函數,但同樣可以得到其圖型。從實驗可知,最佳電流圖型具有最大之分辨率與電壓差值。總之,本研究證明適應式方法藉由實驗獲得最佳電流在電流式電腦斷層攝影系統之可行性與實用性。
In this paper, an adaptive scheme for experimentally obtaining the "best" current based upon the measure of distinguishability is proposed and confirmed. For the inhomogeneity of the centered target and the homogeneity, the "best" current is also derived analytically and shown to be the combination of the spatial cosine and sine function. The experiments studied are two cases of off-centered targets and four cases of centered targets. The targets used in simulation are all copper pipes, whose sizes are 10.5mm, 22.5mm, 35.0mm, and 41.5mm in diameter, respectively. From the experimental data, it is demonstrated that the iterative current converges quickly to the spatial cosine current, i.e., "best" current, for the larger centered targets. For the off-centered targets, the "best" current is no longer spatial sine or cosine, but these currents were shown to concentrate to the target very well. The distinguishability and the maximum voltage differences are also calculated. From these, it shows that the "best" currents all really have the largest distinguishability as well as maximum voltage difference. These "best" current are displayed on screen in two dimension for visual inspection. In summary, the experimentally adaptive scheme for "best' current is proved to be feasible and useful in electric current computed tomography.




本卷期目次
Journal of The Biomedical Engineering Society Of The R.O.C. 10卷1期 (1990.6)
Best Current Pattern in Electric Current Computed Tomography/ Kuo-Sheng ChengJ. S. TzengC. W. Mao
金屬生醫材料之生物親和性之研究/ 謝翠玲周有禮王世宗翁舷誌
機車安全帽吸收衝擊墊料力學性質之初步研究/ 曾明基朱崇聖李茂昌
醫用液體密度計系統之研究/ 傅式恩王家鍾謝瑞香蔡作雍
 
   
 
   

與TAO合作 | 隱私與版權聲明 | 聯絡方式 | 下載Adobe Reader
地址:台北市中正區(100)北平東路30-12號3樓
電話:(02)2393-6968 傳真:(02)2393-6877
Email: service@wordpedia.com
Wordpedia Family: 學校、企業版入口 | 遠流影音館
Copyright©2011 Wordpedia Co., Ltd. All Rights Reserved.